.cate {
    width: 100%;
    height: 100vh;
    background: #f4f4f4;
}

.top {
    position: sticky;
    top: 0;
    z-index: 9999;
}

.content {
    width: 100%;
    height: 100%;
    display: flex;
    overflow: scroll;
}

.left {
    width: 25%;
    height: 100%;
    overflow: auto;
    margin-top: 8px;
}

.right {
    width: 75%;
    height: 100%;
    overflow: auto;
    background: #fff;
    margin-top: 8px;
}

.card {
    width: 100%;
    height: 20px;
    background: #fcc;
}